public void TestValidate()
{
ExprCaseNode caseNode = SupportExprNodeFactory.MakeCaseSyntax1Node();
caseNode.Validate(SupportExprValidationContextFactory.MakeEmpty(_container));
caseNode = SupportExprNodeFactory.MakeCaseSyntax2Node();
caseNode.Validate(SupportExprValidationContextFactory.MakeEmpty(_container));
// No subnodes: Exception is thrown.
TryInvalidValidate(new ExprCaseNode(false));
TryInvalidValidate(new ExprCaseNode(true));
// singe child node not possible, must be 2 at least
caseNode = new ExprCaseNode(false);
caseNode.AddChildNode(new SupportExprNode(4));
TryInvalidValidate(caseNode);
// in a case 1 expression (e.g. case when a=b then 1 else 2) the when child nodes must return boolean
caseNode.AddChildNode(new SupportExprNode(2));
TryInvalidValidate(caseNode);
// in a case 2 expression (e.g. case a when b then 1 else 2) then a and b types must be comparable
caseNode = new ExprCaseNode(true);
caseNode.AddChildNode(new SupportExprNode("a"));
caseNode.AddChildNode(new SupportExprNode(1));
caseNode.AddChildNode(new SupportExprNode(2));
TryInvalidValidate(caseNode);
}
public static ExprCaseNode MakeCaseSyntax1Node()
{
// Build (case 1 expression):
// case when s0.intPrimitive = 1 then "a"
// when s0.intPrimitive = 2 then "b"
// else "c"
// end
var caseNode = new ExprCaseNode(false);
ExprNode node = MakeEqualsNode("IntPrimitive", "s0", 1);
caseNode.AddChildNode(node);
caseNode.AddChildNode(new SupportExprNode("a"));
node = MakeEqualsNode("IntPrimitive", "s0", 2);
caseNode.AddChildNode(node);
caseNode.AddChildNode(new SupportExprNode("b"));
caseNode.AddChildNode(new SupportExprNode("c"));
Validate3Stream(caseNode);
return(caseNode);
}
public static ExprCaseNode MakeCaseSyntax2Node()
{
// Build (case 2 expression):
// case s0.intPrimitive
// when 1 then "a"
// when 2 then "b"
// else "c"
// end
var caseNode = new ExprCaseNode(true);
caseNode.AddChildNode(MakeIdentNode("IntPrimitive", "s0"));
caseNode.AddChildNode(new SupportExprNode(1));
caseNode.AddChildNode(new SupportExprNode("a"));
caseNode.AddChildNode(new SupportExprNode(2));
caseNode.AddChildNode(new SupportExprNode("b"));
caseNode.AddChildNode(new SupportExprNode("c"));
Validate3Stream(caseNode);
return(caseNode);
}